Question

1. if a solution has a hydrogen ion concentration of 1 × 10⁻⁴ m, what is its ph?

a. 6
b. 2
c. 4
d. 8

Explanation:

Step1: Recall pH formula

$\text{pH} = -\log_{10}[\text{H}^+]$

Step2: Substitute given $[\text{H}^+]$

$\text{pH} = -\log_{10}(1 \times 10^{-4})$

Step3: Calculate the logarithm

$\text{pH} = -(-4) = 4$

Answer:

c. 4